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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkComplexToComplexFFTImageFilter_h
#define itkComplexToComplexFFTImageFilter_h
#include "itkImageToImageFilter.h"
#include <complex>
namespace itk
{
/** \class ComplexToComplexFFTImageFilter
*
* \brief Implements an API to enable the Fourier transform or the inverse
* Fourier transform of images with complex valued voxels to be computed.
*
* \ingroup FourierTransform
*
* \author Simon K. Warfield simon.warfield\@childrens.harvard.edu
*
* \note Attribution Notice. This research work was made possible by
* Grant Number R01 RR021885 (PI Simon K. Warfield, Ph.D.) from
* the National Center for Research Resources (NCRR), a component of the
* National Institutes of Health (NIH). Its contents are solely the
* responsibility of the authors and do not necessarily represent the
* official view of NCRR or NIH.
*
* This class was taken from the Insight Journal paper:
* https://hdl.handle.net/1926/326
*
* \ingroup FourierTransform
*
* \sa ForwardFFTImageFilter
* \ingroup ITKFFT
*/
template< typename TImage >
class ITK_TEMPLATE_EXPORT ComplexToComplexFFTImageFilter:
public ImageToImageFilter< TImage, TImage >
{
public:
/** Input and output image types. */
typedef TImage ImageType;
typedef TImage InputImageType;
typedef TImage OutputImageType;
/** Standard class typedefs. */
typedef ComplexToComplexFFTImageFilter Self;
typedef ImageToImageFilter< InputImageType, OutputImageType > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
itkStaticConstMacro(ImageDimension, unsigned int,
InputImageType::ImageDimension);
/** Run-time type information (and related methods). */
itkTypeMacro(ComplexToComplexFFTImageFilter, ImageToImageFilter);
/** Customized object creation methods that support configuration-based
* selection of FFT implementation.
*
* Default implementation is FFTW.
*/
static Pointer New();
/** Transform Direction */
enum TransformDirectionType {
FORWARD = 1,
INVERSE = 2
};
/** Image type typedef support. */
typedef typename ImageType::SizeType ImageSizeType;
/** Set/Get the direction in which the transform will be applied.
* By selecting FORWARD, this filter will perform a direct, i.e. forward, Fourier Transform,
* By selecting INVERSE, this filter will perform an inverse, i.e. backward, Fourier Transform,
*/
itkSetMacro(TransformDirection, TransformDirectionType);
itkGetConstMacro(TransformDirection, TransformDirectionType);
protected:
ComplexToComplexFFTImageFilter():
m_TransformDirection( FORWARD ) {}
virtual void GenerateInputRequestedRegion() ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ComplexToComplexFFTImageFilter);
TransformDirectionType m_TransformDirection;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#ifndef itkVnlComplexToComplexFFTImageFilter_h
#ifndef itkVnlComplexToComplexFFTImageFilter_hxx
#ifndef itkFFTWComplexToComplexFFTImageFilter_h
#ifndef itkFFTWComplexToComplexFFTImageFilter_hxx
#include "itkComplexToComplexFFTImageFilter.hxx"
#endif
#endif
#endif
#endif
#endif
#endif
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